Cheap train sets

Hello, so after trying z scale, i feel like n scale is a much better compromise for price and size because i don't have a lot of space, so i just want to try it out and i was wondering what's the absolute cheapest train set that exist brand new ? Witch brand makes the cheapest stuff, and by set i mean something with some track and a controller, not just a train, but i'm looking for the cheapest thing possible as it's just to try it out and get an idea of how much space it's gonna take